To copy tasks from a project to another, follow these steps.
1. Open the project which to be copied from
2. Open Tasks/Schedule tab to view project tasks grid
3. Select the tasks you would like to copy and right click, then select 'Copy Task'
4. Open the target project and open task/Schedule tab
5. Select a blank and right click, then select 'Past Task'
6. All the tasks are available in the target project